Smart 12V Dual Battery System Isolator 140AMP Voltage Sensitive Relay Switch VSR


Smart 12V Dual Battery System Isolator Kit 140AMP Voltage Sensitive Relay Switch VSR


Prompt Shipping / 1 Years Warranty.




 “ Want To Avoid Paying A Mechanic To Restart Your Car/Truck And Have Power Available For All Your Needs ”



Imagine ... being stuck in the middle of nowhere, your vehicle's or boat's starter battery is flat, the next town is miles away , this is a situation that everyone dreads and no one wants to be in, but fortunately it is one that can be easily avoided. 


Here’s the good news...


This Smart 12V Dual Battery System Isolator Kit 140AMP Voltage Sensitive Relay Switch VSR Can Safely Keep your Battery Power up !



 Voltage sensitive relay, smart 12V battery isolator, Dual Battery
Isolator Kit



As you can imagine ...  with Car, Truck, Caravan, 4x4, Boat Tractor or Camping situation, our power demands have increased a lot from the old days , and whole enjoyment  now more than ever before revolves around powered devices,  so a failure in this area due to low power, can just destroy a holiday completely.



So in my opinion ...  having a power system to back up your whole battery system at all times is paramount.


Far more than your average Dual Battery Isolator  this Unique and Compact Heavy Duty Switch works both way:

- Priority charging for Starter Battery.

- Priority Selecting for Starter Battery.  


Adding a second battery in your vehicle or boat enables you to power your electrics without flattening your main starter battery when the engine is off.

 Intelligent detection circuitry provides automatic selection for Battery charging with automativ isolation to protect your main battery.

NEW ! Also a Manual override option useful with very low discharged starter battery allowing you to select secondary battery to start your car.

It is provided with marine-grade hardware so it can be used on a boat or vehicle. Suitable for 12V systems with a continuous rating of 140A. All wiring hardware and instructions included.


Bonus !3 Battery Terminal and #Crimp Lugs is also included which is very useful to connect to each battery.


*New feature* Manual Overide. 


Great for the outdoors when adding a second battery in your vehicle, boat or trailler. Also it becomes helpful when you go out for traveling, camping, expeditions and more.     



Voltage sensitive relay, smart 12V battery isolator, Dual Battery
Isolator Kit

No need to wait for a Mechanic (when available) and pay an expensive fee.
If you have a Smart Battery Switch with manual control you select the battery to restart your car.


You will have more option to restart your car yourself in no time.


Modern day Battery Voltage switch relay allow you to do more with your battery system.  


Voltage sensitive relay, smart 12V battery isolator, Dual Battery
Isolator Kit


Features : 

When on the move with a secondary battery you can  charge mobile devices (Iphone Ipad), power tools batteries and  have the peace of mind to know that power is always there when you need it.


  • Automatic isolation
  • Priority charging for Starter Battery
  • Allow the vehicle to be
    started from auxiliary battery if the starter battery is flat
  • Easy to install



  • Voltage rating: 12VDC
  • Current rating: 140A
  • Cut-in voltage: 13.3V
  • Cut-off voltage: 12.8V
  • LED Light charging indication: LED
  • IP Rating: IP65
  • Width : 67.5 mm
  • Height : 53.5 mm
  • Depth : 67.5 mm
  • Weight : 0.4kg
  • Dust/Particle Ingress Protection : 6 - Dust tight, no ingress of dust
  • Liquid/Moisture Ingress Protection : 5 - Water jet


Voltage sensitive relay, smart 12V battery isolator, Dual Battery
Isolator Kit Note: Use of the Emergency Override (Yellow Wire)
Connecting the wire to battery negative (or chassis) will force the relay to close, regardless of
the voltage of the starting battery. The main purpose of this is to allow the vehicle to be
started from auxiliary battery if the starter battery is flat. It is recommended that a push button
(momentary) switch be used for this.



Voltage sensitive relay, smart 12V battery isolator, Dual Battery
Isolator Kit   

Whats included
· 1 Smart 12V Battery Switch Isolator 140 Amp
·  3X SC 35-10 Copper Crimp Lugs 
·  2X Positive Marine Battery terminals 
·  1X Negative Marine Battery terminals

Voltage sensitive relay, smart 12V battery isolator, Dual Battery
Isolator Kit



*  The Warranty  * 
1 Years coverage 
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Call us or Email 
- After-Sales Services   - Money Back Guarantee  
- Genuine Australian Seller   - Australian Distribution  


So Why Wait For An Emergency ? Get a Compact Jump Starter Now! 






And remember you risk nothing by saying yes right now. In the unlikely event you are not 100% thrilled and absolutely delighted with your purchase, you will get a prompt and courteous refund on your investment. So if you are not completely happy for whatever reasons simply contact us and we will rush a full no hassle refund .



Welcome to JRAutoFix Ebay Power Seller Online!





FREE Next Day Despatch Australia Wide!!
Fully Insured AU POST With Tracking Number.




Thanks very much for checking out our items & happy shopping!


18000 mah power bank




P.S. If you're serious about putting an end to feeling Frustrated, Unwanted and Annoyed about Missing out on things... PLUS, if you're committed and excited about powering up your car, equipment and Keep your car or equipment going... then the smartest decision you could do is to take action right now while it's at this lowest price ever.


Shipping Options

  • Please note that business days do not include weekends or Victorian public holidays. 
  • Shipping & handling charges are part of the sale. If you do not agree with the charges, please do not bid on this item. 


  • Pickups are not available under any circumstances. 


Free Shipping Fully insured


Payment instructions


Paypal : We accept payment through paypal .


Internet Banking Transfer : We accept payments made via Internet banking from Australian Banks.                                          


Bid Now To Grab A Bargain!     

If we have not heard from you within 7 days from the invoice date, we reserve the right to relist the item and file a dispute. If your payment is received after we have relisted the item, we will deduct our listing fees before returning your payment to you. Obviously we prefer to avoid unnecessary disputes so please contact us if you need to extend the payment time.



Why buy from us?

• JRAutofix is a Registered Australian Business, we source and buy products in bulk from factories around the world and sell it to our customers directly. We have been operating since 2012 and have been providing our customers with outstanding quality products with unbeatable prices
• Great customer service is our priority and we strive to deliver the best to our customers - take a look at our feedback for confirmation
• Our Australian Business Registration Number ABN 18 659 908 229
• We offer 12 months warranty, for your peace of mind • We offer phone and email supports for all your technical needs
• No hidden customs duties and taxes upon importation ( for Australia sales only) • All prices are GST inclusive ( for Australia sales only)
• All stocks are held in Melbourne, so buying from us is generally faster, cheaper and safer than purchasing similar items from overseas sellers
• We constantly improve our product quality by working together with the manufacturer in research and development

Terms and conditions

We have made every effort to fully describe our products and explain our terms as clearly and succinctly as possible. Please ensure that you have read and understood the entire listing, including these terms and conditions, and have agreed to pay the costs involved (including shipping charges) before you place a bid or purchase this item. If you have any question, please contact us before bidding or purchasing this product.
1. Prior to installing/reinstalling the units, we strongly advise you to bench-test the unit first or to test the unit before completely installing it into the vehicle to ensure the unit is working as expected as to avoid wasting any time or money.
2. Orders are delivered by Australia Post.
3. Your order will be dispatched from our warehouse in Melbourne, Australia within 24 business hours after the payment was clear.
4. We do not offer warranty claim for products fall outside of warranty scope. Please refer to our warranty section for more information.
5. If you have any concerns with or do not understand our Terms and Conditions, we encourage you to contact us and we will make address your concerns within 24 business hours.
6. Unless otherwise stated, prices in our website are in Australian dollars. Prices are subject to change without prior notice.
It is important for you to understand these terms and conditions before you make any purchases. By making any purchase, you accept these terms and conditions and accept that these terms and conditions (above) remain in force above and beyond any guarantee(s) provided by any other third party. If you do not agree with the above terms and conditions, please do not purchase this item.


* This product comes with 5 years warranty. If the product is faulty, simply send the item back to us and we will send it to the manufacturer for repair on your behalf.
* Please note: the warranty does not cover deliberate physical damage, severe moisture or electrocution due to static short circuit, inserting into damaged equipment etc.
* In addition, we also guarantee all of our products to be working when you receive them, unless otherwise stated. Your satisfaction is important to us, so if your product is DOA (Dead On Arrival), let us know, and return it to us within 30 days of the date of purchase. We will send a replacement to you as soon as we receive your returned item (Costs associated with returning the items are not refundable. We will pay costs incurred in sending the replacement).
* Provide us a photo/image of the product and email with a description of the issue.
* Please note that items are not tested prior to sending unless requested by you. Despite our efforts to ensure the manufacturer produces products of a consistently high standard, faults can sometimes occur.
* All accessories are not covered by warranty such as the wiring harness, extended wires etc.
* Warranty will be void if products are misused, mishandled or modified in any way.
* Restocking fees maybe incurred in cases of refunds due to change of mind. For International buyers only
* Import duties, taxes and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. * Please check with your country's custom office to determine what these additional costs will be prior to bidding or buying.
* Processing and Handling charges on return items are buyer's responsibility. Refund will be issued as soon as is reasonably practicable and the customer will be provided with an e-mail notification. Refund only applies to the cost of the item


If you are pleased with your purchase, please share your experience with other buyers and leave us positive feedback. If you are dissatisfied with your purchase in any way, please talk to us first!
We are happy to help you solve any problem and if the situation calls for it, we will provide refunds or replacements.
We try to help our customers rectify any problem within reasonable limits.
Depending on the situation, we may still entertain warranty requests even after the warranty period has expired. However, we are under no obligation to do so on a regular basis.



Power bank charger
Power bank charger




























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SKU MB3685
Brand Powertech
Shipping Weight 0.5000kg
Shipping Width 0.800m
Shipping Height 0.600m
Shipping Length 0.800m
Shipping Cubic 0.384000000m3

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